Oval-gear double-seamer head



Oct. 30, 1928.

J. O. MALMQUIST OVAL GEAR DOUBLE SBAMER HEAD Filed June 21, 1926 2 Shoots-Shoat 1 AfTORNEY Oct. 30, 1928.

J. O. MALMQUIST OVA L GEAR DOUBLE SEAMBR HEAD Filed June 21, 1926 2 Shuts-Shoat 2 y .W TOR. I

ATTORNEY Patented a. so, 1928.

: UN TED.s-TATEs PATENT, OFFICE JGHN OSCAR M LMQU IST, or sen FRANCISCO, CALIFORNIA, Assm'noiw. T0 AMnRIoAn CAN COMPANY, or SAN FRANCISCO, CALIFORNIA, A CORPORATION OF new JERSEY;

OVAL-GEAR Donna-seamen ,IIEAD.

V Application filed June 21', 192a" SeriaI N o. 117,303.

Tlie present invention relates to improvements in machines for applying ends to cans by what is commonlyknown as the doubleseaming process. I I I j I I .The principal object of the invention is to provide a machine for: double-seamingso called oval, or elliptical, cans without causing. any appreciable slippage between the seaming rol'ls and the can. A secondary 0bject is to provide such a machine of simpleconstruction, and inwhich-the seainingr rolls can he made inexpensively. I I

. It is customary in the art t o doubleseam elliptical cans in a machine in which the seaniing rolls are both, revolved around the can and rotated upon their own axes at a'con stant speed, as in seaming circular cans.

However, on account of the elliptical contour of the, seam and the constant rotative speed. of the rolls, there is considerable slip page between the peripheries"'ot'saidrolls and the seam at certain portions of the orbit. This slippage is troublesome, and frequent ly results in rubbing the tin platingfoii the metal. of the seam, lea-vingthe bare] ironexf posed to rust. Such slippage can he reduced slightly by 'making the rolls cam shaped,

but this expedient is costly, anddoes -not' lessen the slippage enough to besatisfactory.

The present invention provides means for rotating,"v the seaming rolls at a varying rate of speed corresponding almost exactly to their peripheral travel upon the seam, so thatno appreciable slip occurs. Moreover, the rolls, although ,eccentrically mounted, canbe' made circular, cost as compared to the camshaped rolls mentioned above. The preferred means hy which the invention is carried out'is'herein described and illustratfed'as embodied inf'a well known type of double-seamer in which a pair oifis'earning rolls are carriedin a revolving head, and caused to-trav'el, in an epicyclicpath, about a stationary can. ,It is to'be understood, however, that the principles of the invention may be embodied ininachines' of other types andfor other'uses'; and that the form, arrangement and construction of the several parts hereinafter described may be varied, within the limits of the claimsjhereto appended,without departing from the spirit of the inventionas set forthin. said With this in'vi'ew'a preferred embodiment thereby materially' reducing their.

with reference tothe acco'mpan'yingjdraw Fig.1 is a part sectional elevation ofa well' known type of seaming head with the pre ent invention embodied therein.

Fig; "2 is a' bottom plan view, the can and its holder being. omitted. I i r is a top plan view, partly in section. I Fig e is a'par'tly broken horizontal section taken on. the line k4 of Fig. I. I The drawings show onlyfthe chuck and rotary head of adoubleseainer ofa well known type, the remaining portions of the machine being omitted as'formingno partof the present invention; Referring forthe moment to Fig. 1, the numeral 1 designatesanovallor' elliptical can, having anend'or covrwho'se flange 2 is to'b'e seamed. The can jr e sts'zupon a suita hle holder 3, by which itis' raised to bring its end or cover ln'to contact with chuck 1-, said chuck being elliptical, asshow'n in Fig; 2, to seat securelyu'pon the can end. The chuck 4.- is secured by a set screw- 5',Figl 1, upon the lowerend of a fixed vertical shaftfi;

I 7 is an ejector extending through said shaft and operated in any sni't'abl e manner, not shown; 1 i 5 I Journaled upon the shaft 6 is a rotatable gear Stormed with peripheral teet 'h 9-Figs; 1 and 3, andlsaid gear has mounted in it, on

trnnni0ns 1O ,a' pair of journal blocks 11 in which mfearried' the scanning roll spindles 12. Thet runnions 10f allow said spindles to swing radially at their lowenends. Thrust collars 13 above the To yrnalblocks l1, support the weight of said spindles.

Journztled'upon'the shaft G'fbelow and se cured to'f the gear 8" is a hub 14:, Fig; 1', which hasat its l oweri'end, immediatedly above the chu'ckfi, a spider 15 having oppositely dis- "o'se d slots or guidewa'ys 16, Figs; 1 andfQ. 3ea-ring m'jembers 17 inzwhich the spindles 12 are journalechzare sl id able adially, in said guide'way's', thus guiding the lower ends of i said spin-dies in their swinging movement. Adjustable stop screws 18' limit the outward movement ofsaid spindles;

The spindles 1'2 carry upon their lower ends'the seaming'yroll's 19". ,These'rollls are circular, as shown in Fig; 2, and are eccentricalfly mounted upon the spindles to cause them to follovvthe elliptical sea-In ofthe'ca'n and its end. They are provided with the crum'ed at 22 upon opposite sides the hub are so formed as to operate consecutively to complete the seam, i. e. one roll is first brought into contact with the flange 2 to initially curl the seam, and the other roll subsequently completesit, all in the usual manner.

The. spindles 12 are swung in and out,

likewise in the usual manner, to bring their rolls 19 ,into contact with the flange 2 at the proper times, by levers 21, Fi 1, ful- '14.; The lower ends of said levers are connected by links 23 with the spindle journal members 17. Nuts 24 areprovided upon the ends of said links for adjustment, The upper ends of the levers 21 carry rollers 25 which bear against and follow theface cams 26 secured upon transverse rotating shafts 27 There are two such shafts 27 parallel with each other, each having a cam 26 upon each end. There are also two levers21, operating in unison, for each spindle,as shownfin Fig.

4. The two shafts 27 are inter-connected by gears 28, and one of said shafts is driven,.in the proper timed relation, by a worm-wheel 29 which meshes with a worm 30 formed upon the'fixed central shaft 6. The cam shafts 27' and levers 21 are carried upon the hub 14, and all revolve together around. the fixed shaft 6.

The hub 14 has two opposite arms 31, Figs. 1

3 and 4, equally spaced between the spindles 12, which extend upwardly and are secured to the gear 8 by bolts 32, so that said hub and said gear are rigidly connected together to form the complete head;

The spindles 12 are rotated upon their axes, as the head revolves aboutthe shaft 6, by eccentric pinions 33, Figs. land 4, whici mesh with an elongated or elliptical fixed gear 34 secured upon said shaft/ The chip.

of course, that the diameter and eccentricity of the rolls 19 and the pinions 33 are properly related to the characteristics of the curve of the can flange 2 and the gear 34. e

In the operation of the device, the can 1, with its end or cover loosely resting upon it,

is placed upon the holder 3, and raised therea V .by to'bring said end or cover into firm contact with the chuck 4. The holder 3,. the canl and its end or cover, and the chuck 4 do not rotate, but the revolution of the entire seaming head about the stationary shaft 6 causes the'seaming rolls 19 to be rotated upon their own axes. The revolution of the head also causes the seamingroll spindles 12 to. be swung attheir lower ends, through the agency of the cams 26 and the levers 21, so 1 that the rolls 19 are brought into contact with the flange 2 ofthe can and-consecutivelyand for the proper'duration of time to crimpor curl said flange into a seam in the usual manner.

During the seaming process, the peripheral grooves 20 of the'rolls 19 follow theflange 2 of the can end accurately, without lateral movement of the spindle 12'," on'account of the size and eccentricity of said rolls with relation to contour of the flange 2;.and said rolls follow said flange without slipping thereupon, on account of their varying rotative speed produced by the action of the f eccentricpinions 33 in traveling about the stationary elliptical gear 34.

Iclaim: 1. In a can seaming V ber and a head member, one of said members l machine, avchuck mem being rotatable, and said chuck member being adapted for engagement with the end of a non-circular can; a seaming roll carried by the head member and adapted for rolling contact \viththe peripheryof the can; andmeans including a gear having an eccentric axis'for rotating said seaming roll' w th a varying speed correspond ng to its natural rotation in traveling around and'in contact with the periphery of the can.

i 2. In a canseaming niachine,a chuck member and a head member, one of said members being rotatable, andsaid chuck member being adapted vfor engagement with the end of an elliptical can; a'seamingroll carriedby the head member and adapted for contact. with the periphery of the can; and an elongated 'gear for rotating said seaming roll eccentrically about its own axis with a varying Speed adapting it to roll without slipping around the periphery of the'can. 1 Y f "3. In a can seaming machine, a chuck memher and a head member, one of said members being rotatable, and said chuck member being adapted for engagement with the end of a non circular can; a gear associated with said chuck member, said gear of elongated form having substantiallythelsameshape and size Y I as thecircumference of said'can; a seaming roll carried by the head member and adapted 1 for rolling contact with the periphery of the can and a pinion associated with said seaming roll and adapted to mesh with said gear,

said pinion having substantially the" same shape and sizeas said seaming roll. 4. In a can seaming machine, a chuck member and ahead member, one of said members being rotatable, and said chuck member being non-circular can; a gear associated with and spaced above said chuck member, said gear having substantially the same shape and size as the circumference of said can; a spindle adapted for engagement. with the endof a ro-tatably carried in said head member and swingable relative to the axis of the head member; aseaming roll eccentricallymounted upon the lower end of said Spindle and adapted for rolling contact with the periphery of the can; a pinion eccentrically mounted upon the upper end of said spindle and adapt ed to mesh with said gear, said pinion having the same shape and size as said seaming roll; and means for moving said spindle tocarry said seaming roll into and out of operative relation with the can without disengaging said pinion from said gear.

5. In a can seaming machine, a chuck memher and a head member, one of said members being rotatable, and saidchuck member'being adapted for engagement with the end of a non-circular can; a seaming roll carried by the head member and adapted for rolling contact with the periphery of the can; means including an elongated gear and a pinion having an eccentric axisfor rotating said sea-m ing roll with a varying speed corresponding to its natural rotation in traveling around and in contact with the periphery of the can and means for moving said seaming roll bodily toward and away from the can to carry it into and out of operative contact therewith.

6. In a doub1e-seamer, a chuck member and a head member, one of said members be ng rotatable, and said ,-chuck member being adapted for engagement with the end of a non-circular can; a pair of seaming rolls car; ried by the head member and adapted for rolling contact with theperiphery of the can;

means for rotatingsaid rolls with varying speed corresponding to their natural rotation 1n traveling around and in contact with the periphery of the can; and means for successively moving said rolls bodily into and out of operative contactwith the can to perform thereon, pivotally hung spindles swingable ions eccentrieally fixed on said spindles and meshing with said gear, seamlng rolls carried by said spindles, means for rotating said toward'and from the axis of said shaft, pinspindles, pinions and rolls around the fixed shaft, and means for holding a can and cover to be seamed by said rolls.

In testimony whereof I have signed my name to this specification.

JOHN OSCAR MALMQUIST, 

